Method of signal compression

Details Method of signal compression Method of signal compression

1998-07-09

2000-07-25

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704229, 704500, 382238, 382239, G10L 2104

Patent

active

060946318

ABSTRACT:
A method of signal compression. An input signal is divided into a plurality of segments. Each of the segments is decomposed by wavelet packet transform to a plurality of levels, so that each of the segments is in a form of a group of coefficients in each of a plurality of domains corresponding to each of the levels. Each of the domains is divided into a plurality of sub-domains to calculate a degree of characteristic concentration corresponding thereto. One of the domains having a highest degree of characteristic concentration is select to perform bit allocation and quantization, so that the group of coefficients in the selected domain is represented as an information. The information is formatted into a frame for transmission, and then the frame is output.

REFERENCES:
patent: 5649053 (1997-07-01), Kim
patent: 5682152 (1997-10-01), Wang et al.
patent: 5754793 (1998-05-01), Eom et al.
patent: 5764805 (1998-06-01), Martucci et al.
patent: 5794179 (1998-08-01), Yamabe
patent: 5845243 (1998-12-01), Smart et al.
patent: 5867602 (1999-02-01), Zandi et al.

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